Snap chuck



Jan. 2, 1951 w. ANEST 2,536,149

SNAP CHUCK Filed Dec. 18, 1947 Fig.

3 I 2 *1"- I6 /2 2 1 g4 ,4

j v i Inventor William Anest Patented Jan. 2, 1951 r I SNAP CHUCK William Anest, North Platte, Nebr.

Application 7 Claims.

' This invention relates to new and useful improvements in snap chucks and more particu- "larly this invention relates to an improvement iin'my copending application No. 747,865, filed "May 13, 1947, now Patent No. 2,472,184. 3 A primary object of the present invention is i to provide a snap chuck including a drive shaft engaging spindle and including novel and improved means carried by said spindle for fixedly attaching the hub portion of a sanding head,

bumping or polishing head, or the like, onto said spindle in a quick and precise manner.

Another important object of the present in- :vention is to provide a spindle, and a pivoted latch including an actuating element conveniently located to facilitate the same to be readily accessible to an operator for the attachment or re moval of a tool on the spindle.

A further object of the present invention is to A still further aim of the present invention is to provide a snap chuck that is simple and practical in construction, stron and reliable in use, relatively inexpensive to manufacture, and otherwise well-adapted for the purposes for which the same is intended.

Other objects and advantages reside in the details of construction and operation as more fully hereinafter described and claimed, reference being had to the accompanying drawings forming part hereof, wherein like numerals refer to like parts throughout, and in which:

Figure 1 is a fragmentary elevational view of a rotary vise supporting a drive shaft on which the present invention is applied, and showing a tool applied to the present invention, and with parts broken away and shown in section for the convenience of explanation;

Figure 2 is a transverse vertical sectional view taken substantially on the plane of section line 2--2 of Figure 1; and

Figure 3 is a transverse vertical sectional view taken substantially on the plane of section line 3-3 of Figure 1.

Referring now to the drawings in detail, wherein for the purpose of illustration, there is disclosed a preferred embodiment of the present invention, the numeral I0 represents 2. preferably hollow spindle or driven shaft that is provided with an externally threaded inner end portion I2 and a reduced tubular extension l4 at its outer end portion. An annular shoulder I3 is provided on said spindle In at the juncture of the extension I4 with the spindle, for a purpose which will later be more fully described.

December 18, 1947, Serial No. 792,444

A longitudinal slot I8 is provided in the outer free end 20 of the extension I, and slidably engages a locking lug or lip 22 at one end of a latch '24 or substantially V-shaped, elongated lever 24. The opposite end of this lever 24 is provided with a finger receiving lug or member 26, disposed on the opposite side of the lever from 111g 22, that slidably engages a guide slot or opening 28 provided in the spindle l0 adjacent shoulder Hi. It should be noted, that the opening 28 is disposed on'the diametrically opposite side of the spindle 10 than is slot 18. 1 Y

Fixed within the extension i4, is a'spring' arm or leaf spring 30 having a free arcuate end portion 32 that yieldingly engages one end of the lever 24, for normally urging the locking lug 22 outwardly from slot [8.

In practical use of the device, the finger receiving portion 26 of the lever 24 is depressed into the opening 28, so that the locking lug 22 will extend into the extension [4 and slot l8. The hub or sleeve portion 34 of a sanding, buffing or polishing, head, or any other suitable tool, may be slipped onto the extension l4 so that one end 36 of the hub portion 34 will frictionally engage shoulder It to prevent longitudinal movement of the hub portion 34 inwardly relative to said spindle l0. By then releasing the finger receiving portion 26, the end portion 32 of spring 30 will urge lug 32 outwardly through slot Hi to engage a lug receiving recess 38 provided in the inner periphery or wall of the'hub portion 34, to prevent outward sliding movement of the hub relative to the extension l4. The threaded end portion I2 of the spindle is then receivably engaged in an internally threaded socket 48 of a drive shaft 42 that is fixed in a rotary vise or the like 44. Obviously, any suitable means may be employed for attaching the spindle to a rotary shaft without deviating from the scope of the present invention.

In view of the foregoing description taken in conjunction with the accompanying drawings it is believed that a clear understanding of the device will be quite apparent to those skilled in this art. A more detailed description is accordingly deemed unnecessary.

It is to be understood, however, that even though there is herein shown and described a preferred embodiment of the invention the same is susceptible to certain changes fully comprehended by the spirit of the invention as herein described and the scope of the appended claims.

Having described the invention, what is claimed as new is:

1. A tool locking device comprising a spindle having a longitudinal slot at one end, means carried by the other end of said spindle for detachably engaging a rotary shaft, a tool receiving portion provided on said spindle adjacent said slot, means for preventing inward movement of a tool on said receiving portion relative to the shaft engaging end of said spindle, an elongated substantially V-shaped locking latch provided in said spindle for pivotal movement on its apex, a locking lug at one end of said latch movable into and out of position in said slot, means normally retaining said lug positioned out of said ture of said spindle with said extension for en gaging one end of the hub portion of a tool, a longitudinal slot at the free end of said exten-- sign, an elongated substantially V-shaped rock ceiving portion at the free end of said lever slidslot, and finger receiving means at the free end of said latch and disposed intermediate the ends of said spindle for actuating said latch to position said lug into said slot.

2. The combination of claim 1 wherein said means for preventing inward movement of a tool on said spindle adjacent said slot includes an annular stop shoulder disposed adjacent said finger receiving means adapted tobear against the hub portion of a tool mounted on said tool receiving portion and space the hub portion of a tool from said finger receiving means. 3. The combination of claim 1 wherein said means normalh retaining said lug positioned outwardly .of said slot includes a spring arm fixed at one end within said spindle, the free end of said spring arm bearing against said latch.

4.'Th combination of claim 1 wherein said means for actuating said latch includes a finger receiving element fixed on said lever, said spindle having a slot slidably receiving said finger receiving-element.

:.5.. A tool locking device comprising a tubular spindle threaded at one end to engage the internally threaded socket of a rotary shaft, a reduced hollow-cylindrical extension at the other endfof said spindle for receiving the hub por tion of a tool, an annular shoulder at the juncably received in said guide opening.

6. The combination of claim 5 wherein said slot and said guide opening are disposed on diametrically opposite sides of said spindle and said extension.

: 7. A tool locking device comprising a tubular spindle having inner and outer end portions, a pair ofvdiametrically opposed slots provided in said spindle adjacent the (ends thereof, an elongated substantially veshaped rock bar mounted in said spindle and having oppositely extending lateral projections at the ends thereof slida-bly received said slots, said bar having its apex within the spindle and constituting the fulcrum point for the-bar, and spring means acting on said bar and normally urging said projections.

Number Name- 573,433 Moran l- Dec. 15, 1.896 835,820 Evans et a1. Nov. 13., 19.9.6 1,760,843

Hasty May '27, 1930 

